chapman



O. D. CHAPMAN, OF CHICAGO, ILLINOIS.

Letters Patent No. -77,957, dated May 19, '1868.V

IMPROVEMENT IN TUBETWELLS.

@the .rlghule refont tuin there letters ntmt mit noting putt nf tige same 'IO ALL WHOM IT MAY CONCERN:

'Be it known that I, O. D. CHAPMAN, of Chicago, in the county of' Cook, inthe State of Illinois, have invented'a new and useful Improvement in Tubc-Wells; and I do hereby declare thatthe following is a. full and exactdescription thereof, reference being had to the accompanying drawings, and tothe letters of reference marked thereon, making a part of 4this specification, in which- Figure I is an elevation of my invention. Figure 2, a sectional elevation of the saule.

The nature of my invention consists in making a series-of chambers between the tube and wire cloth, and

n chamber between the cloth and the outer perforated plate, for the purpose of securing the greatest possible,`

amount of filtering-surface. In order to give a correctunderstanding of my invention, I have marked corresponding parts with similar letters, and will now Agive a. detailed description.

A represents the lower section of'a tube-well, having holes B throughit, and attached'hto a point, C, in the usual manner. d represents a series of.nuetal bands put around the tube A between the holes, and soldered tast, for the purpose of keeping the wire cloth E from coming in contact with the tube A, as seen at Iig. 2.

The bands d should not be so wide as to take up any considerable portion of the filtering-surface of the cloth E, and should only be thick enough to form a passage forwater to run freely between the cloth and the tube, i

and enter the holes B. This arrangement obviates'the necessity of grooving the tube A for securingn proper filtering-surface through the cloth, E. And as the banded are4 soldered to the tube A, audAthe-clothE to the bands, there is no liability of their `becoming detached. A-wire, F, is wound spirally over the said cloth for the purpose of forming an -outer chamber between it and an outside perforated plate, G. In the drawings, at-g. 1, a portion of the plate G is represented as broken away, for the purpose ofA showing more clearly the wire cloth and bands underneath, but is intended to cover the cloth, E, andbe fastened securely to tube A, fo

prevent it from becoming detached when said tube is being driven.

It will be seen, from this description, that the wire cloth E has a much greater,filtering-surface, aside from that taken up. by the bands d and wire,`F, than the area of four rows ot holes'B, by which means a sufficient quantity of water will enter said holes, notwithstanding the meshes in the cloth beoomehalf filled with sediment.

What I claim, and desire to secure by LettersfPatent of the United States, is-

'lhe combination of the bands d, wire cloth E, spiral wire F, and perforated plate G, with tube A, `substan-` i tially as and for the purpose set forth. I

'0. D. CHAPMAN.

Witnesses:

G. L. CHAPIN, A. HAYWARD. 

